Snapshot 1.0.430.3 - Mouse gestures for Fast Forward and Rewind

Yeah I'm aware of the options, but there is always some open new window onClick event that annoyingly steal your tab focus. Additionally, It might be only me but having been long using major browsers with this option turned on, my muscle memory just assume new tab = new background tab. So middle click/context menu feels redundant.

Now that I you mention it IIRC Opera Presto is the first tabbed browser to implement this behavior, I used to cringe a lot when I opened a new tab on FF back then.:P

Anyway.. Opera Chromium and current FF has this feature built-in, I think it;s a kind of classic "must have" feature of major browser. Considering Vivaldi philosophy is about tailoring power user needs that makes me wonder why this isn't on the list on the first place.

Yeah agreed, I actually had to install Opera portable to import some bookmarks from Opera Link. I just realized how lightweight Opera is. :D. That's said I'd trade few hundred millisecond delays with full-blown customization any days of the week.

It's true "modern" browsers have that feature "built in," (as in, it is impossible to open new tab in foreground) and that always pissed me off. New tab default behavior in old Opera was always foreground, and that is what I became used to over nearly two decades of browser use. That always struck me as the "proper" way to do it. At least here, one has options, even if changing the default behavior is not yet one of them.

Yeah I've encountered this problem several times on different occasions on Windows 7 64Bits. Using the save button from http://tiddlywiki.com/ at the top right also triggers this, so does using the Single File save extension.
Not sure but it seems to be related to "web formats" that the browser could natively open, downloading an HTML file or an SVG file never prompts for a save location, this is a very old bug I would like to see solved.

Also installing any of the two first weather extensions from this search (like this or this) makes Vivaldi crash

To me the commenting system is generally fine. One thing I'd like to see is the newest comments at the top. Basically bump each comment thread to the top of the comment list when there's a new comment.